R - Pipe operator - Spoken Tutorial Forums

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Pipe operator

For the assignment on pipe operator

1. Use the built-in data set iris. Using the pipe operator, group the flowers by their Species.

2. Summarise the grouped data by the mean of Sepal.Length and Sepal.Width.

How can I summarise 2 variables at the same time in same row

R Pipe-Operator 12-13 min 20-30 sec 04-05-20, 6:29 p.m. sakshi.khanna@juit.ac.in

As far as I understand, you want to have something like the command given below:

iris %>% group_by(Species) %>% summarise(mean(Sepal.Length), mean(Sepal.Width)) %>% View()

04-05-20, 6:51 p.m. sudhakarst

It is giving the error:

Error in iris %>% group_by(Species) %>% summarise(mean(Sepal.Length), :

could not find function "%>%"

05-05-20, 3:37 p.m. sakshi.khanna@juit.ac.in

%>% can be used only after loading the library dplyr, as given below:

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library(dplyr)

iris %>% group_by(Species) %>% summarise(mean(Sepal.Length), mean(Sepal.Width)) %>% View()

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06-05-20, 8:20 p.m. sudhakarst